RE: TC Hashing Filters

Linux Advanced Routing and Traffic Control

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Adam Towarnyckyj (adamt@xxxxxxxxxxxxx) wrote:
>
>----Original Message----
>># Create root qdisc
>>tc qdisc add dev eth1 root handle 1:0 cbq bandwidth 200Mbit avpkt 1000
>>
>># Create transit class
>>tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 200Mbit rate
>>200Mbit allot 1514 weight 2Mbit prio 8 maxburst 10 avpkt 1000
>>
>># Create hash table and attach to transit class
>>tc filter add dev eth1 parent 1:1 handle 2: protocol ip u32 divisor 256
>>
>># Create filter to hash out last octet and link to hash table 2:
>>tc filter add dev eth1 protocol ip parent 1:0 prio 5 u32 ht 800:: match
>>ip src 216.19.49.0/24 hashkey mask 0x000000ff at 12 link 2:
>>
>># Create class for 128Kbit limit
>>tc class add dev eth1 parent 1:1 classid 1:2 cbq bandwidth 200Mbit rate
>>128kbit allot 1514 prio 5 maxburst 20 avpkt 1000 bounded
>>
>># Create filter for IP I'm limiting
>>tc filter add dev eth1 protocol ip parent 1:0 prio 5 u32 ht 2:8c match
>>ip src 216.19.49.140 flowid 1:2
>
>I messed with this a bit more before finally just giving up for today. I
>looked at Gideon's example he posted to this list in the past
>(http://mailman.ds9a.nl/pipermail/lartc/2003q2/008516.html) and copied
>it character by character except I changed the ethernet device it was
>attached to and the IP addresses he was using. Here's what I came up
>with:
>
>tc qdisc add dev eth1 root handle 1: htb
>
>tc class add dev eth1 parent 1: classid 1:2 htb rate 100MBit ceil
>100MBit burst 0Kbit
>

Here the filter parents should be root not 1:2.  I think in the howto it says that
all filters should be attached to root.  I'll get my box up that I have doing this
to give you a working example.

>tc filter add dev eth1 parent 1:2 handle 2: protocol ip u32 divisor 256
>
>tc filter add dev eth1 protocol ip parent 1: u32 match ip src
>216.19.49.0/24 hashkey mask 0x000000ff at 12 link 2:
>
>tc class add dev eth1 parent 1:2 classid 1:3 htb rate 64Kbit ceil 64Kbit
>burst 0Kbit
>
>tc filter add dev eth1 protocol ip parent 1:2 u32 ht 2:8c: match ip src
>216.19.49.140 flowid 1:3
>
>I even tried changing the src to dst and this still does not work.
>Gideon, if you are out there somewhere, I'd appreciate it if you could
>tell me if this actually worked for you. This is the most frustrating
>project I have ever had to deal with because it makes so much sense and
>in theory it looks like it should be working just fine. Anyways, thanks
>for everyone's help. If anyone has any other ideas, I welcome them.
>
>Adam Towarnyckyj
>
>_______________________________________________
>LARTC mailing list / LARTC@xxxxxxxxxxxxxxx
>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>

--
When dealing with a slow pipe, never underestimate the throughput of the postal system.


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